Initial commit starting at version 10.1.8.3rc4.

1 files changed, 35 insertions, 0 deletions

diff --git a/src/lib/include.js b/src/lib/include.js
new file mode 100644
index 0000000..896c6d5
--- /dev/null
+++ b/src/lib/include.js
@@ -0,0 +1,35 @@
+var include = (() =>
+{
+  let  _inclusions = new Map();
+
+  function scriptLoader(src) {
+    let script = document.createElement("script");
+    script.src = src;
+    return script;
+  }
+
+  function styleLoader(src) {
+    let style = document.createElement("link");
+    style.rel = "stylesheet";
+    style.type = "text/css";
+    style.href = src;
+    return style;
+  }
+
+  return async function include(src) {
+    if (_inclusions.has(src)) return await _inclusions.get(src);
+    if (Array.isArray(src)) {
+      return await Promise.all(src.map(s => include(s)));
+    }
+    debug("Including", src);
+
+    let loading = new Promise((resolve, reject) => {
+      let inc = src.endsWith(".css") ? styleLoader(src) : scriptLoader(src);
+      inc.onload = () => resolve(inc);
+      inc.onerror = () => reject(new Error(`Failed to load ${src}`));
+      document.head.appendChild(inc);
+    });
+    _inclusions.set(src, loading);
+    return await (loading);
+  }
+})();